lib/spinlock_debug.c: print owner on spinlock lockup

[firefly-linux-kernel-4.4.55.git] / drivers / leds / led-triggers.c

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index c41eb6180c9c2eb2e88ce2dfbfc64d7ff90daf2a..6f1ff93d7cec32862e5cdc7b998586381c401f1c 100644 (file)
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -231,6 +231,26 @@ void led_trigger_event(struct led_trigger *trigger,
 }
 EXPORT_SYMBOL_GPL(led_trigger_event);
 
+void led_trigger_blink(struct led_trigger *trigger,
+                      unsigned long *delay_on,
+                      unsigned long *delay_off)
+{
+       struct list_head *entry;
+
+       if (!trigger)
+               return;
+
+       read_lock(&trigger->leddev_list_lock);
+       list_for_each(entry, &trigger->led_cdevs) {
+               struct led_classdev *led_cdev;
+
+               led_cdev = list_entry(entry, struct led_classdev, trig_list);
+               led_blink_set(led_cdev, delay_on, delay_off);
+       }
+       read_unlock(&trigger->leddev_list_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_blink);
+
 void led_trigger_register_simple(const char *name, struct led_trigger **tp)
 {
        struct led_trigger *trigger;
@@ -241,9 +261,12 @@ void led_trigger_register_simple(const char *name, struct led_trigger **tp)
        if (trigger) {
                trigger->name = name;
                err = led_trigger_register(trigger);
-               if (err < 0)
+               if (err < 0) {
+                       kfree(trigger);
+                       trigger = NULL;
                        printk(KERN_WARNING "LED trigger %s failed to register"
                                " (%d)\n", name, err);
+               }
        } else
                printk(KERN_WARNING "LED trigger %s failed to register"
                        " (no memory)\n", name);